def uninstallVas(computer, packages="vasclnt vasgp vasyp vasproxy"):
    if 'mac' in computer.os:
        packages = "vasclnt vasgp"
    vas = vasProduct(computer.remoteShell)
    assert vas.uninstall(packages=packages)
def installVas(version, computer, packages="vasclnt vasgp vasyp vasproxy"):
    if 'mac' in computer.os:
        packages = "vasclnt vasgp"
    vas = vasProduct(computer.remoteShell)
    assert vas.install(version, computer.os, computer.version, packages)